There are some application that does not include a spelling checker and you need to check spellings, here you can use tinySpell. tinySpell is a small utility that allows you to easily and quickly check and correct the spelling in any Windows application. tinySpell installs itself in the system tray for easy access.
tinySpell can watch your typing on the fly and alert you whenever it detects a misspelled word. It can also check the spelling of text that you copy to the clipboard.

While you are typing, tinySpell watches the text you enter and whenever it detects a misspelled word it beeps and shows a spelling tip, and the tinySpell icon in the system tray turns from white to yellow. This is free application.

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